I would like to report a successful deployment of the cross-referencing hack I described earlier. Today, I had to make a notation of an appointment at 8:00 a.m., on January 30th, for a plumber to come replace our kitchen sink. You see, our current kitchen sink is so old and disgusting that, regardless of soap and scrubbing, all dishes and kitchen gear emerge from it dirtier than when they entered it. The garbage disposal, too, makes ogrish grinding noises and launches minced foodstuffs skyward when its gears turn. Oh, and don't forget the faucet. Hot water leaks from it in an annoying stream unless you use extreme leverage to twist the hot water knob beyond the usual point at which water flow ceases. We have been forced to use duct tape in order to apply this leverage constantly.
So the whole apparatus has got to go.
I noted the appointment, but there was so much information to accompany it! The name of the company, their phone number, the name of the person with whom I spoke, the price I was quoted, the name of the person who will be coming that day. That would dominate the tiny area for January 30th. So, I simply wrote "8:00 a.m. - Plumber (N7)". Now I know that page 7 of my Notes section contains the relevant data. Page 7 contains other, unrelated data as well. It doesn't matter, as long as it is all accurately cross-referenced.
Voila. Now I can do other things that day.